This document provides information about spring applied brakes from Inertia Dynamics. It describes SAB brakes as being engaged and disengaged in a static condition at zero RPM, making them suitable for use as parking brakes. It lists available models of the SAB brake along with their torque ratings, armature weights, and electrical specifications. Tables provide dimensional information and an ordering code for selecting the proper brake model, voltage, bore size, and other options.

1. 34
Spring Applied Brakes – Type SAB
Spring Applied
Friction Brakes
Inertia Dynamics features a type SAB
spring applied brake. SAB brakes are
designed to be engaged and disen-
gaged in a static condition at zero
RPM. They are best used as a parking
brakes to hold loads in position. These
brakes can be mounted to a flange or
motor using thru-holes or tapped
holes in the field cup. A conduit box
is optional. SAB brakes have been
used extensively for servo brake appli-
cations with minor modifications.
High-temperature coil insulations are
available upon request.
SAB20
SAB90
SAB180, 400, 1200
SAB90 shown
SAB180 shown with
optional conduit box
B
E
F
G
J Dia.
Bolt Circle
M
L
K
H
C
45°
A
Conduit Box
Is Optional➝
A
C
B
M
DFGH E
.120
.105
Air Gap
Set By Inertia Dynamics
I
M
K
30°
Ref.
I
.325
.312 (4 Places)
(2) Set Screws
90° Apart
45°
J Dia.
Bolt Circle
K Dia.
J Dia.
Bolt Circle
H G D E
A
C
B
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2. 35
Spring Applied Brakes – Type SAB
Spring Applied
Friction Brakes
STATIC INERTIA LB. – IN.2
MODEL TORQUE ARMATURE & WGT.
NO. LB.–IN. HUB ASSEMBLY LB.
SAB20 20 .018 1
SAB90 90 .130 3
SAB180 180 .312 5
SAB400 400 .748 7.1
SAB1200 1200 1.732 12.4
MODEL
90 VDC 24 VDC 12 VDC 120 VAC
NO. AMPS OHMS AMPS OHMS AMPS OHMS AMPS OHMS
SAB20 .098 922 .37 65 .72 16.7 .08 N.A.
SAB90 .17 534 .68 35.3 1.34 8.95 .13 N.A.
SAB180 .29 314 1.14 21.10 2.25 5.33 .25 N.A.
SAB400 .39 230 1.54 15.50 3.01 3.98 .33 N.A.
SAB1200 .58 156 2.27 10.60 4.51 2.66 .49 N.A.
Mechanical Electrical
NOTES:
1. SAB1200 – Special .375 x .250 key is
supplied with unit. Mating shaft to have
conventional ASA Standard Keyway.
2. Conduit box is optional on models SAB180,
400 & 1200. Screw terminals supplied in
place of conduit box.
3. Consult factory for Zero Backlash Hub Style
M BORES & KEYWAYS
MODEL HUB A B C D E F G H I J K L NOMINAL KEYWAY
NO. STYLE MAX. MAX. NOM. MAX. MAX. MIN. REF. MAX. ± .500 NOM. DIA. BORE X** Y**
3
/8 .094 – .097 .417 – .427
SAB20 HEX 1.400 1.200 1.255 0.722 2.465 0.605 0.781 2.436 12.0 2.125 0.172 – 5
/16 .0625 – .0655 .347 – .352
3
/8 .094 – .097 .417 – .427
3
/8 .094 – .097 .417 – .427
SAB90 HEX 1.938 1.658 1.753 1.298 3.530 0.740 1.375 3.530 18.0 3.125 0.190 #6 –
1
/2 .125 – .128 .560 – .567
32 X .5
5
/8 .1885 – .1905 .709 – .716
3
/4 .1885 – .1905 .836 – .844
3
/8 .094 – .097 .417 – .427
1
/2 .125 – .128 .560 – .567
SAB180 SPLINE 1.770 1.500 2.930 – 4.260 0.800 1.500 4.129* – 3.75 0.223 #8 – 5
/8 .1885 – .1905 .709 – .716
32 X .5 3
/4 .1885 – .1905 .836 – .844
7
/8 .1885 – .1905 .962 – .970
1
/2 .125 – .128 .560 – .567
5
/8 .1885 – .1905 .709 – .716
SAB400 SPLINE 1.940 1.500 2.930 – 5.010 0.800 1.770 4.514* – 4.5 0.283 #10 – 3
/4 .1885 – .1905 .836 – .844
24 X .5 7
/8 .1885 – .1905 .962 – .970
1 .251 – .253 1.113 – 1.121
1 .251 –. 253 1.114 – 1.124
11
/8 .251 –. 253 1.241 – .1.251
SAB1200 SPLINE 2.050 1.500 2.930 – 6.510 0.900 2.425 5.252* – 5.875 0.409 1
/4 – 11
/4 .251 –. 253 1.367 – .1.377
20 X .5 13
/8 .3135 – .3155 1.518 – .1.528
11
/2 .376 – .379 1.606 – 1.616
Dimensions
*Reference Dimension
**X denotes keyway width, Y denotes keyway height plus bore
See page 3 for ordering information ELECTROMATE
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3. 3
Ordering Information
Electromagnetic
Friction Clutches & Brakes
Spring Applied Brakes
PART NUMBERING SYSTEM FOR PRODUCTS ON PAGES 3 TO 35 OF THIS CATALOG
A A B B - C D E F
DIGIT DIGIT MODEL NO.
1 7 FSB
1 9 FSBR
2 1 FSBR
(MANUAL
RELEASE)
0 1 SL
0 3 BSL
0 5 FL
0 7 SO
0 9 FO
1 1 FB
1 3 SLB
1 5 SOB
1 8 SAB
DIGIT DIGIT SIZE
0 1 001
0 2 003
0 3 007
0 4 015
0 5 035
0 6 050
0 7 100
0 8 200
0 9 08
1 0 11
1 1 15
1 2 17
1 3 19
1 4 22
1 5 26
1 6 30
1 7 42
1 8 20
1 9 90
2 1 180
2 3 400
2 5 1200
DIGIT VOLTS
1 90 VDC
2 24 VDC
3 12 VDC
4 120 VAC
DIGIT BORE
1 1
/8
2 3
/16
3 1
/4
4 5
/16
5 3
/8
6 1
/2
7 5
/8
8 3
/4
9 7
/8
0 1
11 1 1
/8
12 1 1
/4
13 1 3
/8
14 1 1
/2
DIGIT DRIVE
1 ZERO
BACKLASH
2 HEX/SQUARE
3 DYNAMIC
(MANUAL RELEASE
BRAKE ONLY)
4 STATIC
(MANUAL RELEASE
BRAKE ONLY)
5 SPLINE
DIGIT CONNECTION
1 LEAD
WIRES
2 SCREW
TERMINALS
3 SWITCH
(MANUAL RELEASE
BRAKE ONLY)
4 CONDUIT
BOX
How To Order
A. Select the model number from the product guide.
B. Select the size of the clutch or brake.
C. Select the voltage.
D.Select the bore diameter.
E. For all power-on clutches and brakes, select 1. For model FSBR and SAB-20,
& 90, select 2. For model FSB spring applied brakes, select 1 or 2. For man-
ual release brakes, select 3 or 4. For SAB-180, 400, & 1200, select 5.
F. For all clutches and brakes, refer to the product guide and specify 1 or 2.
For manual release brakes, if a switch is desired, select 3, otherwise use a 1.
Example
SL11 clutch, 24 volts, 1
/4Љ bore
Part No. 0110-2311
FSB050 brake, 90 volts, 3
/8Љ bore, Hex drive
Part No. 1706-1521
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sales@electromate.com
Sold & Serviced By: